{
  "manageEntity": {
    "action": "Update",
    "entityId": "326767831",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraasw7bmu65alf7l2vw4rjgfzdzt3zufknj2qqpl4qv43wa5wwojtq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1448541809},{\"type\":\"playlist\",\"playlist_id\":231573422}]}}}",
    "nonce": "0x4eef51a4612559b3137da9647120807ca456a48e19392b44d25d8d81c23aad80",
    "signature": "0x435deb4b8c4427a3d1f2d3b8b17bb91e926c6eaa890fbb477969374320b4fd48412831113ce100e87e737e5da25324ccb14e759a435c8e68ee9cd973e68a5a3d1c",
    "signer": "0xA21b45B80cA89EdC19365C5f9B50d82051294192",
    "userId": "326767831"
  }
}